#include <iostream>
#include <string>
#include <pthread.h>
#include <sys/epoll.h>
using namespace std;
int main()
{
  int b = 0;
  int bb;
  int a = 0;
  int c = 0;
  int z = 0;
  int p = 0;
  int current = 0;
  int *p= nullptr;
  int *pp = nullptr;
  int *pppp=nullptr;
  return 0;
}
